TÍNH TOÁN DUNG LƯỢNG TỐI ƯU CHO HỆ THỐNG PIN MẶT TRỜI/ ẮC QUY TẠI MIỀN BẮC VIỆT NAM DỰA TRÊN PHÂN TÍCH TỔNG LƯỢNG BỨC XẠ HÀNG NĂM

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Tác giả: Thi Hoai Thu Nguyen

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Thái Nguyên, 2020

Mô tả vật lý: tr.43-50

Bộ sưu tập: Báo, Tạp chí

ID: 313497

Thêm vào giỏ Liên kết toàn văn

Bài báo này đưa ra 1 phương pháp để xác định dung lượng tối ưu của hệ thống pin mặt trời kết hợp ắc quy cung cấp điện cho 4 loại tải hộ gia đình và văn phòng ở khu vực miền Bắc Việt Nam. Bài toán được xây dựng với hàm mục tiêu là tối thiểu chi phí tính toán hàng năm (LCE) và ràng buộc về độ phụ thuộc vào lưới (GD) theo yêu cầu cho trước. Thông thường GD phụ thuộc vào chuỗi số liệu thời tiết của bức xạ mặt trời. Tuy nhiên nghiên cứu này đã xây dựng công thức ước lượng GD là hàm số của tổng lượng bức xạ hàng năm, dung lượng của battery và PV sử dụng số liệu thời tiết trong 15 năm của 7 tỉnh miền Bắc Việt Nam. Từ đó có thể sử dụng phương pháp lặp để tìm cấu hình tối ưu của hệ thống tương ứng với GD yêu cầu một cách đơn giản. Ngoài ra, nghiên cứu cũng tiến hành phân tích độ nhạy khi chi phí của hệ thống pin mặt trời và ắc quy thay đổi. Các kết quả tính toán cho thấy phương pháp đề xuất có độ chính xác cao và có khả năng áp dụng với những khu vực khác ở miền Bắc khi không có số liệu thời tiết đầy đủ.This paper proposed a novel method for optimal capacity designing of photovoltaic (PV) system combined with battery supplying to 2 types of load pattern in the North of Vietnam. The optimization problem is to minimize the levelized cost of energy (LCE) and satisfy the required grid dependency (GD). Generally, GD was estimated based on the time series of weather data. In this research, we developed an empirical formula of the GD. The GD was simulated using the meteorological data over the past 15 years in 7 locations in the North of Vietnam. From the results, the GD could be estimated based on the annual total solar radiation, the capacity of PV and battery without consideration of the time series of the weather data. After obtaining the empirical formula, the optimal configuration of the PV/battery system was calculated. The developed formula can lead to the simplicity in process of sizing optimization. Additionally, the sensitivity analysis was also conducted to investigate the results when the price of PV and battery changes. The results show that the proposed method is highly accurate and can be applied to any location in the North, especially with incomplete weather data.

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